Cita APA

Maps.com (Firm) & ebrary, Inc. (1999). U.S. population change, 1950-1970. Maps.com.

Citación estilo Chicago

Maps.com (Firm) and Inc ebrary. U.S. Population Change, 1950-1970. [S.l.]: Maps.com, 1999.

Cita MLA

Maps.com (Firm) and Inc ebrary. U.S. Population Change, 1950-1970. Maps.com, 1999.

Warning: These citations may not always be 100% accurate.